1. Warm Up
Write the questions and your answers on a blank sheet of notebook paper.
List three lab safety rules you already know.
What kind of topics do you think that we study in biology?

2. Lab Equipment Gallery Walk
Pipette
Forceps
Tongs
Beaker
Microscope
Erlenmeyer flask
Goggles
Petri dish
Test tube rack
Slide
Test tube
Slide cover
Graduated cylinder
Hot plate
Probe

3. WARM UP
FINISH THE SPONGEBOB SIDE OF YOUR SCIENTIFIC METHOD WORKSHEET FROM YESTERDAY!
WE WILL HAVE A FIRE DRILL TODAY: TURN LEFT OUT THE CLASSROOM. THEN WHEN YOU GET TO THE MALL TURN LEFT TO GO OUT TO THE TENNIS COURTS!

4. WARM UP
An experiment was designed to investigate the effect of caffeine on heartbeat in water fleas. Two populations had all conditions alike except the fleas in population one had caffeine administered five minutes before their heart beat was checked. Every two hours both populations were selected and heartbeats were monitored.
What is the independent variable in the experiment?
What is the dependent variable in the experiment?
Which group was the control?
What was the scientific question?

5. Graphing

6. Tables
Tables are used to neatly organize data before placing in a graph. Create a table from the following information: A biology studying a plot of land in a forest studied the 5 different type of trees in the plot. Oak- 539 Maple- 758 Beech- 319 Birch- 1,327 Hickory- 222

7. Graphs - show numerical information in a useful format.
three main types of graphs:
circle graphs
line graphs
bar graphs

8. Circle Graphs/Pie Chart
Shows different parts of the data in relation to all the data. Useful in depicting percentages.

9. Bar Graph
A bar graph is used to show data that are not continuous. Often used for comparisons.

10. Line graphs
Used to demonstrate continuous change.

11. When creating a bar or line graph:
The independent variable is put on the horizontal (x) axis
The dependent variable is put on the vertical (y) axis
Label your axis and give the graph a title
Use an appropriate scale on each axis. For example, 1 cm = 10 years so, 3 cm = 30 years
Use the whole page!

13. Let’s Practice
Date
Amount of Precipitation (cm)
Aug 1
0.5
Aug 2
0.0
Aug 3
1.0
Aug 4
0.25
Aug 5
1.25
Aug 6
Aug 7
Aug 8
0.75
Aug 9
1.75
What kind of graph should we create from the following set of data:

14. Let’s Practice- Year Population (in millions) 1881 50.2 1890 62.9 190076
1910 92
1920
105.7
1930
122.8
1940
131.7
1950
151.3
1960
179.2
1970
203.2
1980
226.5
1990
251.4

15. Extrapolate
The process of going beyond the data points. The further from the data points we extrapolate the less accurate our findings.
Predict what the population of the US will be in the year 2010.
Can you be as certain for this prediction as you were for a prediction for the year 2000?
Use the graph to determine the approximate population in 1935, 1945, 1985.